Proof of work existed before Hashcash.

Adam Back explains what Hashcash did differently.

Full episode 👇



https://fountain.fm/episode/ZKZCJoHVviHzdgKYzAUS

https://open.spotify.com/episode/2VztBoyxOkC889kVIAwBN5

https://podcasts.apple.com/nl/podcast/001-episode-whats-bitcoin-part-1-with-adam-back-peter/id1792290510?i=1000686650701

https://rumble.com/v6dy067-001-episode-whats-bitcoin-part-1-with-adam-back-and-peter-todd.html?e9s=src_v1_upp_a

https://youtu.be/5fNR0brqqX0?si=wFaiumcSR-V_pKHu